Study the following reaction carefully. What classification should this reaction have? 4Al + 3O 2 2Al 2 O 3

the answer is a} physical and chemical changes

i think the answer is A. Physical and chemical changes

The answer is: C) Atom D has a Zeff of 6 and is therefore to the right of Atom E, which has a Zeff of 5.

The statement that best explains the position of the two atoms in the periodic table is as follows: Atom D has a Zeff of 6 and is therefore to the right of Atom E, which has a Zeff of 5 (option C).

Periodic table in chemistry is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The effective nuclear charge (Zeff) on an electron is estimated by subtracting the number of electrons between the nucleus and the electron in question (the number of non-valence electrons) from the number of protons in the nucleus (atomic number).

According to this question, two atoms with their electron configuration is given. Atom D and E have Zeff of 6 and 5 respectively.

This means that option C is correct.

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Speed is the distance travelled per unit time.

speed.  and to go fast as fu*k boi

Answer:- [tex]N_2O_3[/tex] has 2 atoms of nitrogen and 3 atoms of oxygen. [tex]CaCO_3[/tex] has 1 atom of calcium, 1 atom of carbon and 3 atoms of oxygen.

Explanations:- The numbers written as subscripts for the elements in formulas of the compounds represents the number of atoms of that particular element.

The first compound is [tex]N_2O_3[/tex] and in this the subscript of N is 2 and that of O is 3. It means it has 2 atoms of N and 3 atoms of O.

Second compound is [tex]CaCO_3[/tex] and in this the subscript of Ca is not shown it means it is 1, similarly the subscript of C is 1 and subscript of O is 3. So, the compound has 1 atom of Ca, 1 atom of C and 3 atoms of O.

ANSWER: C) Law of Conservation of Mass

EXPLANATION: In the given cycle, it is seen that th sediments are layered and gets compressed into sedimentary rocks which eventually gets heated and compressed to form metamorphic rocks. But, the total amount of minerals present in the sediments remains the same throughout any stage of the cycle.

This proves the law of conservation of mass which states that mass can not be created nor be destroyed, it can only be transferred from one form to another. So, in this case, only phase transition occurred but the component which is mineral inside the sediments remains constant.

Therefore, the answer is law of conservation of mass.

For a scientist, using technical jargon and a structured format is appropriate when communicating with fellow scientists. However, when reaching out to the general public or media, more straightforward language is more effective.

In scientific writing, the utilization of technical jargon and a structured format is often applicable while communicating with other scientists. This is because other scientists are more likely to understand the highly technical terms due to their background and expertise. For instance, a molecular biologist writing a research paper for a peer-reviewed journal would engage an academic tone and utilize specific terminologies that his or her fellow scientists can understand. However, when scientists are writing books to generate interest among the general public, giving TV or radio interviews, or presenting information to the media, it’s crucial to simplify the language. This ensures that science remains accessible to non-specialists who may not be familiar with the jargon.

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The chief advantage of the metric system over other systems of measurement is that it B. is in multiples of 10.

This can be seen in the picture below that shows the prefixes of the metric system.

Answer:

The correct answer is option B, that is, is in multiples of 10.

Explanation:

The metric system refers to an internationally acclaimed decimalized system of measurement. It is used globally, and it is the most usual or the only system of measures and weight in the places where it is adopted.  

As the metric system is a decimal system of measures and weight, it is easy to transform in between the units, for example, from grams to kilograms, or from millimeters to meters, basically by dividing or multiplying by 10, 100, 1000, and others. Usually, this is the case of moving the decimal point to the left from the right.  

The force which helps protons overcome their natural inclination to repel each other is call the strong force. A

Final answer:

The force that helps protons overcome their natural repulsion and holds atomic nuclei together is the strong nuclear force, making option A (protons; strong) the correct answer.

Explanation:

There are four fundamental forces in the universe, one of which plays a critical role in maintaining the structure of atomic nuclei despite the electrostatic repulsion between protons. This force, which helps protons overcome their natural inclination to repel each other, is known as the strong nuclear force. The strong nuclear force acts not only between protons but also between neutrons, and between protons and neutrons, effectively holding the nucleus of an atom together. It is much stronger than the electrostatic repulsion between the positively charged protons within the distances found inside the nucleus but becomes virtually non-existent over larger distances.

Thus, the correct answer to the question is: This force, which helps protons overcome their natural inclination to repel each other, is called the strong nuclear force, corresponding to option A) protons; strong.

Explanation: When Iron(III) nitrate reacts with lithium hydroxide in their aqueous state produces Iron (III) hydroxide and Lithium nitrate in their aqueous state.

Balancing a chemical reaction: In a chemical equation, the total number of atoms and total charge on every element remains same on both reactant and product side.

Balanced Chemical reaction will be:

[tex]Fe(NO_3)_3(aq.)+3LiOH(aq.)\rightarrow Fe(OH)_3(aq.)+3LiNO_3(aq.)[/tex]

The balanced molecular equation is [tex]\boxed{{\text{Fe}}{{\left( {{\text{N}}{{\text{O}}_3}} \right)}_3}\left( {aq} \right) + {\text{3LiOH}}\left( {aq} \right) \to {\text{Fe}}{{\left( {{\text{OH}}} \right)}_3}\left( {aq} \right) + 3{\text{LiN}}{{\text{O}}_3}\left( {aq} \right)}[/tex].

Further Explanation:

The three types of equations that are used to represent the chemical reaction are as follows:

1. Molecular equation

2. Total ionic equation

3. Net ionic equation

The reactants and products remain in undissociated form in the molecular equation. In the case of the total ionic equation, all the ions that are dissociated and present in the reaction mixture are represented while in case of the overall or net ionic equation only the useful ions that participate in the reaction are represented.

The steps to write the molecular equation are as follows:

Step 1: Write the molecular equation for the reaction with the phases in the bracket.

In the reaction, [tex]{\text{Fe}}{\left( {{\text{N}}{{\text{O}}_3}} \right)_3}[/tex] reacts with LiOH to form [tex]{\text{Fe}}{\left( {{\text{OH}}} \right)_{\text{3}}}[/tex] and [tex]{\text{LiN}}{{\text{O}}_{\text{3}}}[/tex]. The unbalanced chemical equation is as follows:

[tex]{\text{Fe}}{\left( {{\text{N}}{{\text{O}}_3}} \right)_3}\left( {aq} \right) + {\text{LiOH}}\left( {aq} \right) \to {\text{Fe}}{\left( {{\text{OH}}} \right)_3}\left( {aq} \right) + {\text{LiN}}{{\text{O}}_3}\left( {aq} \right)[/tex]

Step 2: Then we write the number of atoms of all the different elements that are present in a chemical reaction in the reactant side and product side separately.

• On reactant side,

Number of iron atom is 1.

Number of nitrogen atoms is 3.

Number of oxygen atoms is 7.

Number of lithium atom is 1.

Number of hydrogen atom is 1.

• On the product side,

Number of iron atom is 1.

Number of nitrogen atoms is 1.

Number of oxygen atoms is 6.

Number of lithium atom is 1.

Number of hydrogen atoms is 3.

Step 3: Initially, we try to balance the number of other atoms of elements except for carbon, oxygen, and hydrogen by multiplying with some number on any side. Lithium and iron atoms are balanced on both sides. To balance the number of nitrogen atoms, multiply [tex]{\text{LiN}}{{\text{O}}_{\text{3}}}[/tex] by 3. Now the reaction is,

[tex]{\text{Fe}}{\left( {{\text{N}}{{\text{O}}_3}} \right)_3}\left( {aq} \right) + {\text{LiOH}}\left( {aq} \right) \to {\text{Fe}}{\left( {{\text{OH}}} \right)_3}\left( {aq} \right) + \boxed3{\text{LiN}}{{\text{O}}_3}\left( {aq} \right)[/tex]

Step 4: After this, we balance the number of atoms of carbon and then hydrogen atom followed by oxygen atoms. There is no carbon atom in the reaction. To balance the number of hydrogen and oxygen atoms, multiply LiOH by 3. Now the reaction is,

[tex]{\text{Fe}}{\left( {{\text{N}}{{\text{O}}_3}} \right)_3}\left( {aq} \right) + \boxed3{\text{LiOH}}\left( {aq} \right) \to {\text{Fe}}{\left( {{\text{OH}}} \right)_3}\left( {aq} \right) + \boxed3{\text{LiN}}{{\text{O}}_3}\left( {aq} \right)[/tex]

Step 5: Finally, we check the number of atoms of each element on both sides. If the number is same then the chemical equation is balanced. The balanced chemical equation is as follows:

[tex]{\text{Fe}}{\left( {{\text{N}}{{\text{O}}_3}} \right)_3}\left( {aq} \right) + 3{\text{LiOH}}\left( {aq} \right) \to {\text{Fe}}{\left( {{\text{OH}}} \right)_3}\left( {aq} \right) + 3{\text{LiN}}{{\text{O}}_3}\left( {aq} \right)[/tex]

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1. Balanced chemical equation: https://brainly.com/question/1405182

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Answer details:

Grade: High School

Subject: Chemistry

Chapter: Chemical reaction and equation

Keywords: Balancing, LiOH, LiNO3, Fe(NO3)3, Fe(OH)3, 1, 3, 6, 7, iron atoms, oxygen atoms, hydrogen atoms, nitrogen atoms, lithium atoms, 3 LiNO3, 3 LiOH.

Option B- Diverging is the correct answer.

Muscovite and biotite mica are the two minerals that a property in common which is tenacity .

Tenacity is the ability of the mineral to resist breakage. It is described in terms such as elastic, felixible etc.

Both muscovite and biotite mica are elastic minerals as these minerals bend when force is applied on them, but they regain their original shape when the external force is removed.

i think its B Hope this helps :D

1. The correct answer is B. Subscript; how many hydrogen molecules which are there  in that one molecule.

Chemical formula above is a superscript and it represents hydrogen molecules in one molecule.

2. The correct answer is C. No, the equation is not balanced. In the equation the oxygen it has less atoms which represents the products.

Given:

Volume of wine = 100 ml

Initial Mass of ethanol = 12.0 g

Mass of acetic acid formed = 4.00 g

To determine:

% ethanol converted to acetic acid

Explanation:

Molar mass of C2H5OH (ethanol) = 46 g/mol

Molar mass of C2H4O2 (acetic acid) = 60 g/mol

The reaction of ethanol in air is:

C2H5OH + O2 → C2H4O2 + H2O

Based on the stoichiometry: 1 mole of ethanol produces 1 mole of acetic acid

Moles of ethanol initially present = mass of ethanol/molar mass

= 12/46 = 0.2609 moles

Moles of acetic acid produced = moles of ethanol converted

= 4/60 = 0.0667 moles

Mass of ethanol converted = Moles of ethanol * molar mass

= 0.0667 * 46 = 3.07 g

% ethanol converted = (mass of ethanol converted/initial mass )*100

% converted = (3.07/12.0) *100 = 25.6%

Ans: 25.6% of ethanol gets converted to acetic acid

I just scored the test I'm 100% sure its: 1.2 x 10^10 mm^3

CHECK THE ATTACHMENT FOR COMPLETE QUESTION.

The correct answer to the question is 1.2 × 10∧10 mm³

Given:

Volume = 12m³

Volume = 12m³

But

1m³ = 10∧9 mm³

Then if 1m³ = 10∧9 mm³ we can say

1m³ = 10∧9 mm³

12m³ = X mm³

Where X is the required volume in mm³

( 1m³ × X ) =( 10∧9 mm³ × 12 m³ )

X = 12 × 10∧9 mm³

=1.2 × 10∧10 mm³

Therefore, equivalent volume of 12m³

is 1.2 × 10∧10 mm³

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There are four Earth's spheres: the geosphere, hydrosphere, biosphere and atmosphere.

The spheres interact with one other. For example, plants (biosphere) produce oxygen (atmosphere) from carbon dioxide (atmosphere).

Substances in different spheres are recycled and turned into other phases and forms. This is important cycle and without that, there is no life on Earth.

A wedge, a type of simple machine, transforms an input force into a larger output force by providing a mechanical advantage, which multiplies the force applied over a shorter distance. This is done by converting the applied force into two components and creating a separation or splitting effect. Real-world factors like friction reduce the efficiency of this conversion.

A wedge is a simple machine that transforms an input force into a larger output force. The principle of a wedge is similar to that of an inclined plane; it converts a single force into two components: one perpendicular to the wedge's surface (which pushes objects apart), and the other parallel to it (which helps to move the wedge further into the object). The mechanical advantage of a wedge is given by the ratio of the length of the sloped side to the thickness of the wedge. This provides a greater force over a shorter distance, compared to what would be required to separate the objects without a wedge. In terms of physics, the work done (force x distance) remains constant, but the force is effectively amplified due to the mechanical advantage.

When considering the efficiency of a wedge, it is important to account for friction and other real-world factors, as these will reduce the effectiveness with which the input force is converted into output force. In a frictionless scenario, a perfectly efficient wedge would convert all of the input work into output work, but in reality, some energy is always lost to heat and other forms of non-useful energy, making the actual mechanical advantage less than the ideal.

As an example, consider a situation in which a man uses a wedge to split a block of wood. If he exerts a force of 400 N, and the wedge exerts a force of 1,400 N on the wood, the mechanical advantage is the ratio of the output force to the input force, which in this case, is 1,400 N / 400 N = 3.5. However, if the wedge travels further than the separation of the crack, there is a loss in efficiency.

The answer on Edge is Moseley.

(d) Density of Benzene: 0.8786 g/cm cubed

(m) Mass: 20.00g

Formula to solve (v) volume of benzene: V=m/d

V=20g / 0.8786g/cm cubed

Answer: Volume of benzene is: 22.8 cm cubed  

Explanation: Well, density is mass divided volume. In this, it is what the volume is. All you need is mass divided by density. Hope this helps!

Molar mass HCl = 36.5 g/mol

number of moles:

mass of solute / molar mass:

9.63 / 36.5 => 0.263 moles

Volume = 1.5 L

M = n / V

M = 0.263 / 1.5

M = 0.1753 mol/L

stronger than aluminum

Answer:

The given blank can be filled with stronger than aluminium.

Explanation:

The metals, which have been mixed with other elements or metals to obtain new characteristics are known as alloys. The metal alloys generally provide more durability, greater strength, and flexibility over the base metal. One of the prime advantages of a metal alloy is that it can strengthen metal or can minimize cost, and at the same time sustaining some of its own substantial characteristics.  

In aluminum alloys, aluminum is the main metal amalgamated with magnesium, zinc, copper, or other metals.  

They seem to eat a lot ranging from woody plants to vines, though in the rainforest most of their diet is made up of Malaysia and plant material, to be more specific

So I would go with leaves, 50%

Flowers, buds, and insects, 10%

Fruits, 40%

--They also really like figs

Siamangs primarily rely on leaves for their diet, being folivorous, and are native to tropical forests of Southeast Asia where they feed on indigenous foliage.

Siamangs, the largest of the Hylobatidae family and classified among the \lesser apes\, are native to the tropical forests of Southeast Asia. They are quite distinct in their dietary habits, with a strong preference for being folivorous, meaning they primarily eat leaves. On the other hand, their relatives, the gibbons, are more \frugivorous\, favoring a diet composed mainly of fruit.

Siamangs are known for their large size—about twice that of gibbons—and their unique black coloration with large throat sacs used for their characteristic vocalizations. Unlike their larger ape counterparts, they do not make nests but instead sleep on their callused ischium resembling ischial callosities.

The domestication of plants in Thailand, a region within the siamangs' range, included the cultivation of various roots, cucumbers, peppers, and beans, and encouraged the growth of banana, coconut, sago, and breadfruit trees. Although siamangs are wild animals and do not rely on domesticated crops for food, their diet in natural habitats includes \foliage\ from indigenous plants found in the dense tropical forests of the region.

Strontium has a larger atomic radius because it has more shells of electrons than magnesium does.

Mg is in Period 3 and Sr is in Period 5. Thus, Sr has two more shells of electrons than Mg.

Each shell is bigger than the one before it, so Sr has a larger atomic radius than Mg.

Both Sr and Mg have the same number of valence electrons, so they are not a factor in determining the atomic radius.

The nucleus is so small compared to the size of an electron shell that its size is not a factor in determining the atomic radius.

Answer:

The electron cloud

Explanation:

Rutherford’s gold foil experiment showed that the atom consisted of a tiny nucleus inside of a much larger electron cloud.

The diameter of the electron cloud is about 50 000 times that of the nucleus.

The electron cloud contributes the most to the volume of an atom, as it occupies almost all of the atom's space compared to the much smaller nucleus that contains most of the mass.

To determine whether the nucleus or the electron cloud contributes the most to the volume of an atom, we need to consider the structure of an atom. An atom is made up of a nucleus, containing protons and neutrons, and an electron cloud that contains electrons. While the nucleus contains nearly all of the atom's mass due to the relative mass of protons and neutrons, it's the electron cloud that occupies the majority of an atom's volume. The comparison in size is dramatic: If the nucleus were a blueberry, the atom could be the size of a football stadium, with the empty space being the difference between the two.

The electron cloud, which is where electrons have a significant probability of being found, does not have a definite boundary. Nevertheless, the space that is encompassed within where an electron can be found with 95% probability is used to define an atom's size. Given these facts, the electron cloud contributes far more to an atom's volume than the dense, compact nucleus at the center.

Yes metalloids happen to behave as an insulator, sometimes being electric.

Answer is: 0.102 moles of HCl would react.

Balanced chemical reaction:

2HCl(aq) + Sr(OH)₂ → SrCl₂(aq) + 2H₂O(l).

V(Sr(OH)₂) = 37.1 mL ÷ 1000 mL/L.

V(Sr(OH)₂) = 0.0371 L; volume of the strontium hydroxide solution.

c(Sr(OH)₂) = 0.138 M; molarity of the strontium hydroxide solution.

n(Sr(OH)₂) = c(Sr(OH)₂) · V(Sr(OH)₂).

n(Sr(OH)₂) = 0.0371 L · 0.138 mol/L.

n(Sr(OH)₂) = 0.0051 mol; amount of the strontium hydroxide.

From balanced chemical reaction: n(Sr(OH)₂) : n(HCl) = 1 : 2.

n(HCl) = 2 · n(Sr(OH)₂).

n(HCl) = 2 · 0.0051 mol.

n(HCl) = 0.0102 mol; amount of the hydrochloric acid.

The question involves stoichiometry in a chemical reaction between hydrochloric acid (HCl) and strontium hydroxide (Sr(OH)2). The provided volume and molarity of Sr(OH)2 allow us to calculate the needed moles of HCl, which revolves around a 2:1 stoichiometric ratio. Therefore, to react with 37.1 mL of 0.138 M Sr(OH)2, we need 0.0102 moles of HCl.

The subject matter involves a chemical reaction between hydrochloric acid (HCl) and strontium hydroxide (Sr(OH)2). First, we need to identify the stoichiometric ratio between HCl and Sr(OH)2. The chemical equation for their reaction is 2HCl + Sr(OH)2 → SrCl2 + 2H2O, indicating a 2:1 ratio between HCl and Sr(OH)2.

Next, calculate the moles of Sr(OH)2 using the given volume and molarity: 37.1 mL Sr(OH)2 * (1 L/1000 mL) * 0.138 mol/L = 0.0051 mol of Sr(OH)2. Since the ratio of HCl to Sr(OH)2 is 2:1, this means we would need 2 * 0.0051 = 0.0102 moles of HCl for the reaction.

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To find the mass of bromine that reacts with 16.2 g of aluminium, we need to use the concept of stoichiometry. According to the balanced chemical equation, 2 moles of aluminium react with 3 moles of bromine. By converting the mass of aluminium to moles and using the mole ratio, we can determine the moles of bromine required. Finally, converting the moles of bromine to grams gives the mass of bromine.

To determine the mass of bromine that reacts with 16.2 g of aluminium, we need to use the concept of stoichiometry, which is the quantitative relationship between reactants and products in a chemical reaction.

The balanced chemical equation for the reaction between bromine and aluminium is:

2Al + 3Br2 → 2AlBr3

From the equation, we can see that 2 moles of aluminium react with 3 moles of bromine to produce 2 moles of aluminium bromide. Therefore, we need to convert the mass of aluminium to moles, and then use the mole ratio to find the moles of bromine required. Finally, we can convert the moles of bromine to grams.

Let's calculate step by step:

By following these steps, you will be able to find the mass of bromine that reacts with 16.2 g of aluminium.

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Answer:- A. statements 1 and 2 are both true.

Explanations:- As per Le Chatelier's principle, a reaction shifts to the direction where it could oppose the change made to it at equilibrium. For example, if a reactant concentration is increased by adding it then the reaction shifts to the product side so that the added reaction could be used.

The reaction is exothermic in nature as heat is a product means the heat is released in the reaction.

So, if the heat is added then reaction must shift to the left side so that the added heat could be used.

Similarly, if the reaction mixture is cooled then reaction shifts to the right side so that the heat could be generated.

Hence, both the statements are true and A is the correct choice.

Answer:

A is correct

Explanation:

The elements of Group 1 (the alkali metals) have the most reactive metals.

Cesium (Cs) is so reactive that it reacts explosively with water.

The alkali metal family contains the most reactive metals, with sodium (Na) as an example of a highly reactive alkali metal.

The most reactive metals are found in the alkali metal family, which is located in group 1 of the periodic table. The reactivity of metals in this group increases as you move down the group. An example of an alkali metal is sodium (Na), which is known for its high reactivity, especially with water, often producing hydrogen gas and a strong exothermic reaction.

Apart from alkali metals, the alkaline earth metals in group 2 are also relatively reactive but less so than alkali metals. For instance, calcium (Ca) is an alkaline earth metal that reacts with water, albeit less vigorously than sodium or other alkali metals. In contrast, the noble gases in group 18, such as helium (He) and neon (Ne), are known for their lack of reactivity, hence the term 'inert gases.'